Cardi B is being sued by her ex-manager for a huge $10million, according to US reports.

The US rapper, whose real name is Belcalis Almanzar, left Klenord “Shaft” Raphael for a new management group, who also looks after the likes of Migos, last month.

Shaft claims he discovered the 25-year-old in 2015 and had a huge impact on her meteoric rise to fame over the past year.

"Since discovering Cardi B in 2015, Shaft has played an integral role in developing her music career and public image," Shaft's spokesperson said in a statement to Variety.

While he is proud of their successful collaborations as she evolved from Instagram influencer to music megastar, Shaft is disappointed by her actions to freeze him out of her career, which are detailed in the complaint.

"Shaft is confident that his lawsuit will validate his conduct and substantiate his legal claims."

Cardi previously worked as a stripper, and later gained fame on social media before appearing as a cast member in US reality TV series Love And Hip Hop: New York.

Variety reports that Shaft is claiming he orchestrated the rapper's relationship with VH1, who broadcast Love & Hip Hop, while developing her music career and putting her in contact with lots of big players in the music business.